Custom Post Type theme in Twenty Twenty-One

Hello, I would like to create a template for a Custom Post Type, with the theme “Twenty Twenty-One”.

I want to show in the CPT single page, in frontend:

• the featured image,
• the main content with a description, and
• the year.

And then,

• Custom Post Types fields, and
• Custom taxonomies, both values and with links.

I kindly ask which is the best way to approach this. Do I create…

• single-my-cpt.php …or…
• template-parts/content/content-single-my-cpt.php ?

Many thanks!